Good question! The short answer is that it depends. I believe you are talking about centrally monitored alarms that would use your phone line to connect to the central - in general these companies are reluctant to anything that is voip and would try to up-sell specific modems to attach to your home alarm. Though note these are quite expensive and not always required. There is however a new growing monitoring industry that is embracing internet and certainly allows voip usage; you can find more details @ http://www.gonevoip.ca/resources/voi...alarm-systems/ Also there's growing testimonial evidence that in-spite of having a voip phone alarm systems do continue to work (depends on the age of the central located at the home, if it's capable to communicate with ATA adapters used with VOIP)

We've got some questions regarding this so thought to post it here as well. Here are (some of) the advantages of using a so-called 'Virtual Number' or at times referred as 'Extra Number' enabled by VoIP's flexibility and affordability.

our number doesn't go in the phone book, hence it doesn't end up on canada411.com.

the greedy a$$'s that keep calling over and over are doing it mainly from overseas. they look up numbers on canada411.com and start dialing. they will never respect your requests to be taken off their 'lists' and reporting them to the donotcall list will never work, because they are untouchable. they have no 'list' because they are simply opening up online phonebooks and letting their fingers do the walking.

i was getting multiple calls a day from these jerks, and magicjack stopped ALL of it.
of course, i still get the odd call from a company i have had service from before, but never again from the overseas dolts who were just cold calling

Thanks Anisa for sharing. The sad reality is that there are multiple ways one's number could get in the wrong hands. For instance Airmiles db was hacked some time ago, or any other loyalty program, or if you enter your phone/address in any company website say for a coupon or voucher be sure to read the privacy policy because if it says they may share it with partners that actually means they are going to sell it out there. Also is regrettable business in Canada still make use of those overseas calling centers, in-spite of public out-cry and the do-not-call list advertised with all the government fanfare (at the time). Though there's hope, note earlier this month the CRTC fined Comwave for violating the do-not-call rules.

It's good to know that the CRTC is going after actual companies where they can track who they are and where they are. The sad reality is that the ppl from overseas that are not trackable. It's a real nuisance.